* {
  padding: 0;
  margin: 0;
  list-style: none;
  box-sizing: border-box;
}
html,body,#root,.App{
  width: 100%;
  height: 100%;
}
a{
  text-decoration: none;
}
.App{
  display: flex;
  flex-direction: column;}
#root {
  width: 100vw;
  height: 100vh;
  display: flex;
  flex-direction: column;
}
header {
  width: 100%;
  height: 50px;
}
main {
  flex: 1;
  background-color: #f5f5f5;
  overflow-y: scroll;
}
footer{
  width: 100%;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-around;
}
.mask{
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.5);
  position: absolute;
  top:0;
  left:0;
}
.con{
  width: 800px;
  height: 500px;
  position: fixed;
  left:0;
  top:0;
  background: #fff;
}
.active {
  color: red;
}
.tabtitle{
  width: 100%;
  height: 30px;
}
.tabtitle span{
  display: inline-block;
  margin: 0 10px;
}
.tag{
  width: 800px;
  height: 100px;
border: 1px solid;
}
.on{
  color:aqua
}